Revert of Remove uses of SkImageDecoder from gms

gm/copyTo4444.cpp

Index: gm/copyTo4444.cpp
diff --git a/gm/copyTo4444.cpp b/gm/copyTo4444.cpp
index f790d7fcc1785e4bca6c9ffc659d6dd27a768d3d..635cc7b8344a6d789a0e5d85985cec72dd2e130d 100644
--- a/gm/copyTo4444.cpp
+++ b/gm/copyTo4444.cpp
@@ -32,7 +32,9 @@
 
     virtual void onDraw(SkCanvas* canvas) {
         SkBitmap bm, bm4444;
-        if (!GetResourceAsBitmap("mandrill_512.png", &bm)) {
+        SkString pngFilename = GetResourcePath("mandrill_512.png");
+        if (!SkImageDecoder::DecodeFile(pngFilename.c_str(), &bm, kN32_SkColorType,
+                                        SkImageDecoder::kDecodePixels_Mode)) {
             SkDebugf("Could not decode the file. Did you forget to set the "
                      "resourcePath?\n");
             return;